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Colin Patrick McCabe
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[HADOOP-10282] Create a FairCallQueue: a multi-level call queue which schedules incoming calls and multiplexes outgoing calls
...The FairCallQueue ensures quality of service by altering the order of RPC calls internally. It consists of three parts:1. a Scheduler (`HistoryRpcScheduler` is provided) which provides a pri...
, 2016-05-20, 21:57
[HADOOP-10376] Refactor refresh*Protocols into a single generic refreshConfigProtocol
...See https://issues.apache.org/jira/browse/HADOOP-10285There are starting to be too many refresh*Protocols We can refactor them to use a single protocol with a variable payload to choose what...
, 2016-03-21, 15:39
[HADOOP-11238] Update the NameNode's Group Cache in the background when possible
...This patch addresses an issue where the namenode pauses during group resolution by only allowing a single group resolution query on expiry. There are two scenarios:1. When there is not yet a...
, 2015-08-31, 03:50
[HADOOP-10825] Refactor class creation logic in Configuration into nested class
...This first patch refactors class creation inside Configuration into a nested class called ClassCreator (a pretty uninspired name; I’m up for better naming suggestions). Since this is a refac...
, 2015-05-03, 01:05
[HADOOP-11299] Selective Group Cache Refresh
...Currently groups can be refreshed via dfsadmin -refreshUserToGroupMappings, but this places an undue stress on LDAP if we clear everything at once, where we may only want to refresh a single...
, 2014-11-12, 21:33
[HADOOP-10302] Allow CallQueue impls to be swapped at runtime (part 1: internals) Depends on: subtask1
...We wish to swap the active call queue during runtime in order to do performance tuning without restarting the namenode.This patch adds only the internals necessary to swap. Part 2 will add a...
, 2014-11-06, 23:46
[HADOOP-10284] Add metrics to the HistoryRpcScheduler
, 2014-11-06, 21:52
[HADOOP-10283] Make Scheduler and Multiplexer swappable
...Currently the FairCallQueue uses the DecayRpcScheduler & RoundRobinMultiplexer, this task is to allow the user to configure the scheduler and mux in config settings...
, 2014-11-06, 21:51
[HADOOP-10280] Make Schedulables return a configurable identity of user or group
...In order to intelligently schedule incoming calls, we need to know what identity it falls under.We do this by defining the Schedulable interface, which has one method, getIdentity(IdentityTy...
, 2014-09-04, 02:16
[HADOOP-10285] Admin interface to swap callqueue at runtime
...We wish to swap the active call queue during runtime in order to do performance tuning without restarting the namenode.This patch adds the ability to refresh the call queue on the namenode, ...
, 2014-09-04, 02:16
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